our 2 yr old son was from the second fully stim icsi/ivf cycle (both dh and i have issues)... ds was the fresh transfer... We had 3 eggs to use... ds was the first one, the fresh one! lol.
DD was the second one, frozen, transferred when DS was 10 months old on the expectation that none of our frozen embryos would work!!! we were moving interstate so wanted to use our last 2 eggs before we left and stupidly assuming we'd be trying for a couple of years again!

So 3 years of trying for DS and 1 month for DD! Miracles do happen (and still one embryo left!)